Re: [sc-users] buffer problems w/ auto-recorder

On Fri, Mar 6, 2009 at 10:37 AM, Andre Castro <andrecastro@xxxxxxxxx> wrote:

Thank you so much for your help Marije. (I realised then I'd sent the code with a few bugs. sorry for that).

The completionMessage seems to to the job. I manage to get onto the buffers what was being recorded. However, I start getting an error message every time ~state is zero: ERROR: Message 'bufnum' not understood    and I don't why SC doesn't understand \bufnum

Any idea of how I can solve this?
i'm a bit crap with SC, don't get around around using it as much as I wished.

best
a

here's again the code, with the changes

~buffers=List[]; //empty list of buffers
b= Buffer.alloc(s, 44100*30,1); //long buffer to record in to

//Synth: amp analysis and recording

//use headphones to prevent feedback
SynthDef(\gate, {arg sample, lagTime=0, thresh= 0.01, ampAttack=0.04, ampRelease=0.04, attack=0.05, release=0.05, delTime=0, bufnum=0, run;

var source, trigger, envelope, on, off, time, output, record;

    source = AudioIn.ar(1);
    trigger = (Lag.kr(Amplitude.kr(source, ampAttack,ampRelease),lagTime) < thresh);
    envelope = EnvGen.kr(Env.asr(attack, 1, release, 1,curve:'sine'), trigger);    output = DelayN.ar(source, 1, delTime) * envelope;
        on = Trig1.kr(trigger);
        off = Trig1.kr(1-trigger);
        time = Line.kr(0, 1000000 ,1000000);
        SendTrig.kr(on,1,time);
        SendTrig.kr(off,0,time);
    record= RecordBuf.ar(output*2, bufnum, 0, 1, run);
Out.ar(1, output);
}).send(s);

        ~state = OSCresponder(s.addr,'/tr',{ arg time,responder,msg, completionMessage;
            [time,responder,msg];
             msg[2].postln.switch(
                1, {~startTime= Main.elapsedTime;
                    ~gate.set(\bufnum,b.bufnum, \run,1); },

                0, {~endTime= Main.elapsedTime;
                ~length=(~endTime-~startTime);
                ~complet;
                ~gate.set(\run,0);
                     ~buffers.add(Buffer.alloc(s, 44100*~length, 1,
                     completionMessage: {b.copyData(~buffers.last, 0, 0, 44100*~length)} ));
                    };)
            }).add

        ~state.remove;

~gate= Synth (\gate, [ \tresh, 0.001,\ampAttack,0.01, \ampRelease,0.1, \lagTime, 4, \delTime,0, \lagTime2, 0]);

        ~gate.free

~buffers.size
~buffers[0].plot
nescivi wrote:
Hiho,

On Wednesday 04 March 2009 09:39:54 Andre Castro wrote:
  
Dear list, I'm working on a auto input recorder, that record only what
is under the amp follower threshold.
To this point it seems to work well.

However I'm trying to implement a autonomous buffer recording system,
adding a new buffer every time it stops recording, the audio is copied
to a new buffer.

I don't know where I'm messing it up, but in the end the resultant
recorded buffers turn out to have recorded the same moments, are
repeated and seems to have bits of audio from previous buffers. Quite
confusing (and I've tried it a lot).

Would anyone would be kind enough to help to solve this.

Cheers,

andré




~buffers=List[]; //empty list of buffers
b= Buffer.alloc(s, 44100*30,1); //long buffer to record in to

//Synth doing amp analysis and recording
//use headphones to prevent feedback
SynthDef(\gate, {arg sample, lagTime=0, thresh= 0.01, ampAttack=0.04,
ampRelease=0.04, attack=0.05, release=0.05, delTime=0, bufnum, run;
var source, trigger, envelope, on, off, time, output, record;

    source = AudioIn.ar(1);
    trigger = (Lag.kr(Amplitude.kr(source,
ampAttack,ampRelease),lagTime) < thresh);
    envelope = EnvGen.kr(Env.asr(attack, 1, release, 1,curve:'sine'),
trigger);    output = DelayN.ar(source, 1, delTime) * envelope;
        on = Trig1.kr(trigger);
        off = Trig1.kr(1-trigger);
            time = Line.kr(0, 1000000 ,1000000);
            SendTrig.kr(on,1,time);
        SendTrig.kr(off,0,time);
    record= RecordBuf.ar(output*2, bufnum, 0, 1, run);
Out.ar(1, output);
}).send(s);


//OSCresponder that send rec mesg to Synthdef and adds recorded buffers
to buffer list
        ~state = OSCresponder(s.addr,'/tr',{ arg time,responder,msg;
            [time,responder,msg];
               msg[2].postln.switch(
                1, {~startTime= Main.elapsedTime;
                    ~gate.set(\bufnum,b.bufnum, \run,1); },

                0, {~endTime= Main.elapsedTime;
                 ~length=(~endTime-~startTime);
 ~gate.set(\run,0);
            ~buffers.add(Buffer.alloc(s, 44100*~length, 1) );
    
I imagine that Buffer.alloc is asynchronous, so it can take a while for it to 
be ready to copy data into. So you may want to use the completion message of 
Buffer.alloc to do the copying (see Buffer helpfile).

Also you might want to change the line into:
~buffers = ~buffers.add(Buffer.alloc(s, 44100*~length, 1) );

see the Array.add documentation :
"For Arrays, the 'add' method may or may not return the same Array object. It
will add the argument to the receiver if there is space, otherwise it returns
a new Array object with the argument added."


I hope that helps.

sincerely,
Marije

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